Add 'ALPNProtocols' option to TLS Node

Hi all,

In some branches network, where the security policy is strict (eg. only allowing http/https), running mqtt using port 8883 is not working. My options is using only port 443, but it’s not working. After few dyas, i learned that we need to specified Application Layer Protocol Nego (ALPN) options in TLS handshaking.

I’m not into a programming, but i try editing one of the file below, is working.

file: @node-red/nodes/core/io/05-tls.js Excerpt:

TLSConfig.prototype.addTLSOptions = function(opts) { ... ... opts.ALPNProtocols = ["x-amzn-mqtt-ca"]; return opts; }

My question is, can we include this options in the node-red GUI on mqtt tls options? At least user can specified what is the ALPN strings that they want.

Thanks you

[hbcelik]

Hello all, is there any update regarding this feature ?

[knolleary]

Hi @tarunbatra - sure. Before you dive into the code, would be good to agree what exactly the scope would be.

There are lots of possible options on the TLS node - I had wanted to do a bit of a review to see if there were any other ‘obvious’ ones to ought to be exposed in some way.